1. Achieving quantum supremacy *won't* magically give us super powerful supercomputers that can do everything better than standard computers;
And it doesn't mean anything for any other tasks, where standard computers might & likely will be better;
That's when a quantum computer will perform a specific *useful* task better than a traditional computer;
- make better quality qubits that are as low noise as possible and with extended lifetime, and
- error-correct those qubits with special error-correcting codes;
Noise doesn't mean they are jumping around loudly. Noise is any kind of external interference that may disturb uber-fragile...
At least those that use integrated circuits to make their qubits, like Google, IBM, Intel, Rigetti...
Like the one in the video I filmed at @IBMResearch ⤵️
To overcome this hurdle, we should at least start building what's called "logical qubits" - error-corrected ones. Except they are still theoretical.
That's Microsoft lab in Sydney:
Can we ever achieve quantum supremacy? Very likely.
Will achieving it be useful? Probably not really, as qubits will likely still be very noisy & it'll deal w a single task, just to show that it's possible
Well, actually, quality of qubits is way more important than quantity. & boy, are they noisy
There's lots of hype, yeah. But we shld continue. Even w NISQ, we likely will achieve quantum advantage - & f fintech, pharma, high en physics, encryption & more it'll be crucial
That's what some quantum computing skeptics are quick to point out.
But that's ok - as I said, once/if we achieve quantum advantage with NISQ, that'll be a really big deal!